Brake arrangement for six-wheel trucks.



W. H. LEWIS & J. A. PILO HERE BRAKE ARRANGEMENT FOR SIX WHEEL TRUCKS.

APPLIOATION FILED JAN.14,1913.

1,068,674. K Patented July 29, 1913.

2 SHEETS-SHEET 1y EIEPP] yew vW. H LEWIS & J. A. PILGHER. BRAKE ARRANGEMENT FOR SIX WEEEL TRUCKS.

APPLICATION FILED JAN. 14, 1913. V

Patented Ju1y29, 1913.

2 SHEETS-SHEET 2.

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WILLIAM H. LEWIS AND JOHN A. PIL'CHER, OF ROANOKE, VIRGINIA.

BRAKE ARRANGEMENT FOR SIX-WHEEL TRUCKS.

. p W W Specification of Letters Patent. Patented J l 9 1913 Application filed January 14, 1913. Serial N01 741,959.

Todllwhom it mail/ concern:

Be it known that W8,'WILLIAM H. LEWIS and J oHN A. PIIL HER, citizens of the United States, residing at Roanoke, in the county of Roanoke-and State of Virginia, have invented certain new and useful Improvements in Brake Arrangements for Sin- Wheel Trucks, of which the following is a specification. f

The object of this invention is to provide a simple and eiiicient arrangement of brake beams, levers, rods, etc., for six-wheel trucks for railway cars.

With this object in z;view, our invention cgnsists in the combination and-arrangement of parts as willbe more fully hereinafter described and particularly pointed out in the appended claim.

--.'In the drawings, Figure 1 represents in plan view a truck with our invention applied, showing the brake beams for the truck as hanging from the bolster of the truck Fig. 2 is a side elevation, in section, and Pi g. 3 an end"elevation of the same. Fig. 4 is a plan view showing an alternate arrange:

ment in which the brake beams are suspended from and supported by the truck Fig. 5 is a side elevation in an end elevation partly in section of this latter arrangement of beams.

Referring to the drawings in which like parts are given the same reference numbers wherever they occur, 1 represents the bolster of a six wheel truck of the typeshown and described in our previous application for Letters Patent, Serial No. 718,910, filed Sept. 6, 1912, 2 represents the side frames of the same, and 3-4 and 5 the pans of wheels on their respective axles.

' The brake beams 6 are hung from the bolster 1 in the customary manner, by means of U-shaped hangers 7 which are hmged to s the bolster-at the top by means of transverse, horizontal pintles, the brake heads 8 being hooked over the U-shaped hangers at the bottom. The brake shoes 9 are keyed to the brake heads 8 in the usual manner.

' The brake beam 6 which is intended for fulcrumed at a point 11 to the bolster 1, the

brake beam being pivotally connected to the bottom of the lever 10 at 12. As will be hereinafter shown, the location of this fulcrum point should be such that the braking power will be equalized among all of the beams. A pull rod 13 is pivotally connected at one end to the top of lever 10 at 1 1 in such a manner that a longitudinal pull in the rod 13 will force the brake shoes 9 against the wheels 5. The other end of thepull rod 13 is pivotally connected at 14." to the top of a floating lever 15. This floating lever 15 is intended to operate the brake beam for the middle pair. of wheels 4: and is pivotally connected to said brake beam at 16. I

A push rod'17 is pivotally connected at its inner end to the bottom of lever lfiat 18 and extends longitudinally of the truck between and below the axles of the wheels 1 and 3, the outer end of the same being pivotally connected at 19 to the bottom of a second floating lever 20 which is intended to actuate the brake beam for the outer truck wheels 3, the brake beam being pivotally connected to the lever 20 at 21. The top of the lever 20 is arranged at 22 for pivotal connection to a pull member 23 from the brake operating mechanism on the car bodv The operation of our invention is as follows: lVhen the hand or power brake on the car body is applied, the rod 23 pulls the top of lever 20 outward and draws the brake shoes up against the wheels 3. The lever 20 fulcrums at 21 and pushes the bottom of lever 15 inward, pushing the brake shoes up against the wheels 4. Lever 15 in turn fulcrums about thepoint 1G and the top of lever 15 moves outward. pulling with it the rod 13 and the top of lever 10. Lever 10 being permanently fulcrumed at 11, the

brake beam for wheels 5, which is connected and rods, but show the beams hung from or,

supported by the side frames instead of from the bolster as in Figsvl, 2 and 3.

With this arrangement the vertical move- .ment of the bolster on the springs relative wheels, however, is hung by a U-shaped.

- .hanger 3215mm a point 28 on aside frame in the identical-manner described in the previous arrangement of brakes hung from the bolster. l/Viththis arrangement itis necessary to provldereleasesprings 29ifor the outer brake beams-t0 throw themback from the wheels when the brake is released. The beam for the middle wheels, however, as well as all ofthose in-the arrangement with the brakes hung from the bolster will drop away from their own weight and so require no release springs. In order to'allow free movement of the bolster, vertically, in respect to the brake beams when they are supported from the side frames itis necessary to provide a floating fulcrum 11, for'the lever 10. This is accomplished by means of the links 30' which are pivoted at their in ner ends to a bracket 31 on the bolster, the "outer ends of saine forming the fulcrum point 11 for the lever 10. The operation'of the levers, etc-.,' in this latter arrangement is the same as already described for brakes hung from the bolster.

Havingthus described our invention, what we claim as new and desire to secure by Let-'- ters Patent 15, p

In a 6-wheel truck for railway cars, the

"f'combination of a b0lster,;3 axles with their customary wheels, boxes, bearings, etc., a

brake-beam with. heads and shoes for each pair of said wheels, a dead lever'fulcrumed to said bolster, to the lower end of which is pivotally connected the brake beam-for an outer pair of wheels, a tension member pivotallyconnected-at one end to the top of said dead lever, and pivotally connected at its otherend to the top extremity of a float .ing lever, to which is pivotally' connected be.

tween the'extremities of lsaidfloatiiig lever,

.the brake beam for the middle pair of -wheels,"-a compression member pivotally c'onnected at oneend'to the bottom extremity of said floating lever, and an additional fi0ating lever pi'votally connected at its bottom extremity to the other end of said compres sion member, to which is pivotally connected between .the extremities of the aforesaid additional floating lever the brake beam for the other outer pair of wheels, and having at the brake rigging onthe car body.

In testimony whereof we .aflix. our-signa tures in presence of two witnesses. v WILLIAM H. LEWVIS. JOHN A. PILCHER.

Witnesses:

R; H. Rnnsrivenn, B. W. KADEL,

so" its topextremity means for connection wi h 

